Form tie and spreader



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FORM TIE AND SPREADER FiledJune 29, 1946 II III INVENTOR llrne, G. Royzher.

Patented Apr. 4, 1950 UNITED STATES PATENT OFFICE FORM TIE AND SPREADER Arne G. Royther, Long Beach, Calif.

Application June 29, 1946, Serial No. 680,429

1 Claim. 1

This invention relates to a novel form tie and spreader in which the spreader bar can be removed from the concrete wall after the concrete has set.

An object of my invention is to provide a novel form tie and spreader in which the walls of the form are efiectively held in spaced relation, and also in which the entire form structure is effectively tied together, all of this being accomplished with my tie and spreader in a simple and effective manner.

Another object of my invention is to provide a form tie and spreader in which the structure of the tie and spreader is such that leakage will be prevented through the holes which are necessarily cut in the walls of the form.

A feature of my invention resides in the simple and effective means whereby the threaded bars can be inserted or removed both quickly and easily by inserting a nail or a pin through appropriate holes in the threaded bar.

A further feature of my invention resides in the groove in the spreader member which prevents rotation of this spreader member after the concrete has been poured and has set.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claim.

In the drawing:

Figure l is a'iragmentary, transverse sectional viewof a form structure with my tie and spreader mounted thereon.

Figure 2 is a fragmentary side elevation of my form tie and spreader with parts broken away to show interior construction.

Figure 3 is an enlarged end view of the spreader bar.

Referring more particularly to the drawing, the

- concrete form I consists of spaced walls 2 and 3,

which are usually formed of wood. Horizontal walers 4 are included as part of the form structure, all of which is usual and well known. The concrete wall or the like 5 is poured between the walls 2 and 3, again in the usual and well known manner.

A spreader bar 6 is placed between the walls 2 and 3 before the concrete is poured, and is held in position, as will be further described. The spreader bar 6 is tapered continuously from end to end-that is, it is frustro conical in form. With this structure, the spreader bar can be driven out of the concrete wall 5 after it is set by driving the spreader bar out through the end having the greatest diameter. A groove 7 extends lengthwise of the spreader bar 6, and the purpose of this groove is to prevent rotation of the spreader bar in the concrete wall and after the concrete has set. This is useful when the parts are disassembled, as will be further described.

The walls 2 and 3 each have holes 8, 9 drilled therein, and threaded tie rods [0 extend. through these holes and screw into either end of the spreader bar 6 and into the tapped holes H. A shoulder I2 is formed on the tie bar and presses against the outside of the form wall, and also causes the spreader bar to be pulled tightly against this same wall, thus sealing the holes 8 or 9 to prevent leakage, The tie bars l0 extend through the walers 4, and a nut 13 screws onto the outer end of the tie bar and bears against the walers, thus tying the form structure together in a complete and effective manner.

Spaced holes [4 and I5 are provided in the tie bar and these holes can receive a nail or a pin, which act as a stop for the nut 13 and enables the tie bar to be threaded into or out of the spreader bar very easily and quickly. When the tie bars are removed, it is important that the spreader bar shall not rotate, and it is at this time that the groove 7 is of importance in that the spreader bar is thus prevented from rotating.

Having described my invention, I claim:

A form tie and spreader comprising a solid spreader bar, said spreader bar being tapered from end to end, and having a groove on the surface thereof, said groove extending longitudinally thereof, a tie bar threaded into each end of the spreader bar, and a nut threaded on to each of the tie bars, each of said tie bars including a shoulder thereon spaced from the end of the spreader bar and each tie bar having spaced holes therethrough, a pin fitted into any one of the holes against which the nut bears to thread or unthread the tie bar.

ARNE G. ROYTHER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,309,084 Zimmerman July 8, 1919 1,723,631 Pollock et al Aug. 6, 1929 1,782,897 Hudgin Nov. 25, 1930 1,938,153 Reeves Dec. 5, 1933 2,162,869 Symons June 20, 1939 2,168,990 Hungerford Aug. 8, 1939 2,190,748 Williams Feb. 20, 1940 

